It's only certain models that genuinely command higher prices, there are quite a number of chancers on Ebay asking batty money for some of these cameras. I'm glad I held onto my black Nikon FM2n, I bought an FE2 a while ago, which after having the seals replaced, replacing the broken eyepiece rubber and changing the screen which was marked (amazingly I found a mint one for £5 in a local market) is rather a nice camera. I do have an OM1n with three lenses and a couple of Konicas, the latter don't have a lot of value, although they are quite interesting. The cameras which don't really seem to have an great interest are most autofocus SLRs, I do have three Nikons, but I doubt all of themtogether would fetch much more than £50. I bought an F80 from a local trader, I asked him the price, he said £20, foolishly I said "if it had been a tenner", he then said "sold". It does have the advantage of being compatible with G lenses though.